Roof Cleaning, Gutter Cleaning & Moss Removal in Oregon
NJM Roof & Gutter Cleaning is a licensed and insured exterior cleaning company based in St. Helens, Oregon, serving the Portland Metro area. We specialize in soft wash roof cleaning, gutter cleaning, moss removal, pressure washing, house washing, and window cleaning for residential and commercial properties.
Why Oregon Homeowners Choose NJM
Licensed
Oregon Contractor CCB #252799
Insured
Fully insured with $1M liability coverage
Rating
4.9/5 stars (130+ Google reviews)
Guarantee
100% satisfaction guarantee on every job
Protect Your Oregon Home From Moss, Rain & Water Damage
Your roof is your family’s first line of defense against Oregon’s relentless rain, wind, and moss. When thick moss takes hold and gutters overflow, you’re not looking at a cosmetic issue, you’re watching thousands of dollars in potential damage build up season after season. Foundation repair from water damage alone averages $4,000–$12,000 in Oregon.
We’re NJM Roof & Gutter Cleaning, and we’ve spent years helping homeowners across St. Helens, Scappoose, and the Portland Metro area protect their homes before small problems become expensive emergencies. We’ve cleaned hundreds of roofs and cleared gutters throughout Columbia County and Washington County, and we understand exactly what Oregon’s wet climate does to your home’s exterior. Whether you’re near Columbia View Park dealing with heavy Douglas fir needle buildup, or on a rural Scappoose property facing severe moss growth, we’ve seen it all, and we know how to fix it.
Our Exterior Cleaning Services
Professional Exterior Cleaning Solutions for Oregon’s Climate
Every service is designed specifically for Oregon’s wet climate. Each one protects your home, extends the life of your property, and improves curb appeal.
Roof Cleaning & Moss Removal
Our professional soft wash roof cleaning safely removes moss, algae, and black streaks from asphalt shingle, cedar, and tile roofs without pressure washing damage. We use biodegradable cleaning solutions that kill moss and algae at the roots and prevent regrowth for 1–2 years. Soft washing is the method recommended by roofing manufacturers because it protects your shingles’ protective granules while delivering a deep clean.
Typical cost: $300–$600 for residential homes.
Gutter Cleaning & Maintenance
Oregon homeowners should clean their gutters at least twice a year — once in late fall after the leaves drop and once in spring after pollen season. Clogged gutters cause water to overflow into your fascia boards, soffit, foundation, and landscaping, leading to rot, mold, and structural damage. Our professional gutter cleaning removes all debris, flushes downspouts, and includes a drainage test to make sure everything flows properly.
Typical cost: $150–$300 for average-sized homes.
Pressure Washing & House Washing
Professional pressure washing and soft-wash house cleaning restore your home’s exterior, driveways, decks, walkways, and patios by removing years of built-up dirt, algae, mildew, and staining. We adjust our technique based on your surfaces — low-pressure soft wash for siding and trim, higher pressure for concrete and stone.
Typical cost: $200–$500 for residential properties.
Window Cleaning
Achieve streak-free, crystal-clear windows that let more natural light into your home. Our professional residential window cleaning removes hard water spots, pollen buildup, and environmental contaminants from both interior and exterior glass. We clean frames, sills, and screens as part of every visit.
How Much Does Exterior Cleaning Cost in Oregon?
Here’s what Oregon homeowners can expect to pay for professional exterior cleaning services. Exact pricing depends on your home’s size, roof pitch, and condition.
How It Works
Get Your Home Cleaned Easy
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Step 1: Request a Free Quote
Contact us by phone, text, or online form. Most estimates can be provided same-day using photos you send us of your roof, gutters, or the area needing service. For more complex projects, we'll schedule a quick 15-minute on-site visit at your convenience.
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Step 2: Schedule Your Service
Once you approve the quote, we'll work with you to find a convenient time that fits your schedule. Most services can be completed within 3-7 days, and we offer priority scheduling for urgent issues like overflowing gutters or pre-inspection cleanings.
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Step 3: We Get To Work
Our professional team arrives on time with all the right equipment, clearly marked vehicles, and a detailed plan. We'll introduce ourselves, explain exactly what we'll be doing, and answer any questions you have before we start.
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Step 4: Enjoy Your Clean Home
After we've finished, we'll do a final walkthrough (in person or via photo/video) to ensure you're completely satisfied with the results. We'll also provide maintenance tips and recommendations for keeping everything in great shape.
Customer Testimonials
What Our Oregon Customers Are Saying
Don’t just take our word for it, here’s what our neighbors are saying:

NJM was great! Quick estimate and scheduling. They came out and cleaned debris off our roof, treated it for moss, and cleaned out our gutters. A couple things were missed during the initial visit and I reached out to see if it could be corrected. They came back out (no questions asked) and made sure everything was taken care of. I really appreciated their willingness to ensure all the work was completed and well done. We'll be using NJM in the future. Thanks!
Alexandra Orchard

We have used this company for several years for gutter cleaning and have been impressed with their work. As a result we plan to schedule additional services such as window cleaning, power washing and gutter repairs. They are knowledgeable; staff is well trained; polite and they leave the work area immaculate. Their availability is always flexible to meet our needs. In addition, they are just plain nice and they treat their staff just as nicely. We are happy to recommend them.
Jerry Riggs

From the estimate to the execution, everything was excellent. Received estimate and the next week work was scheduled. I received a house washing, window cleaning and gutter cleaning. Very responsive, great communication and fast efficient work. My house was VERY filthy and it looks as close to brand new a 20 y/o house can. Both gentlemen are professional, knowledgeable and personable. Price for all the work was fair and industry standard. I highly recommend NJM and they now have a long term customer!
Leslie Pepe

Our HOA board contacted Cameron when one of our unit’s gutters needed repaired and cleaned. He responded promptly, gave us a very reasonable quote, and expertly did the needed repairs. He also gave us a quote for annual gutter cleaning & moss maintenance for all units. We highly recommend NJM Roof& Gutter Cleaning.
Cindy Dowds Warmington

The scheduling process for NJM was great, Camron was responsive and was the first of 3 companies to get a quote out and had a lot of availability. I had some concerns about how the gutter cleaning went (some piles of leaves left behind) and i reached out to Camron about it and he addressed it and made it right! Absolutely recommend.
Wes Welsford

My roof was cleaned off with a blower and then the gutters were cleaned out. Finally, debris from the roof was cleaned up from my yard. My roof was also treated so moss would not grow! My Beaverton roof and gutter are clean and ready to survive high winds and an atmospheric river this weekend ! I would hire this company again!
Scott Baker
Areas We Serve Across Oregon
We proudly serve homeowners and businesses throughout Columbia County, Washington County, and the greater Portland Metro area. If you’re within 30 miles of St. Helens, we can typically accommodate your location.
Our primary service areas include:
- St. Helens (headquarters)
- Scappoose
- Portland
- Hillsboro
- Beaverton
- Warren, Deer Island, Columbia City, and surrounding communities
Don’t see your city? Call us at (971) 328-2122, we’re always happy to extend our reach.
Answers To Common Roof & Gutter Cleaning Questions
Whether you need roof cleaning, gutter cleaning, pressure washing, or window cleaning, we’re here to help. Call (971) 328-2122 or fill out our online form for a free, no-obligation estimate. Most quotes are provided within 2–4 hours.
FREQUENTLY ASKED QUESTIONS
Answers To Common Roof & Gutter Cleaning Questions
What services do you offer?
We offer comprehensive exterior cleaning services including roof cleaning and moss removal, gutter cleaning and maintenance, house washing, pressure washing (driveways, decks, walkways), window cleaning, and Christmas light installation. We handle both residential and commercial properties throughout the St. Helens and Portland Metro area.
Are you licensed, bonded, and insured?
Yes, we are fully licensed as an Oregon contractor (CCB #252799), bonded, and carry comprehensive liability insurance ($1M coverage) plus workers’ compensation for all employees. Your property and our team are fully protected.
How do I get a quote?
Getting a quote is easy! You can call or text us at (971) 328-2122, or fill out our online form. For faster quotes, text us photos of your roof, gutters, or the area needing service. Most quotes are provided within 2-4 hours, and many can be given same-day over the phone.
How much does roof cleaning cost in Oregon?
Roof cleaning in Oregon typically costs $300–$600 for a standard residential home. The final price depends on your roof’s size, pitch, the severity of moss or algae growth, and accessibility. We provide free, no-obligation estimates — call (971) 328-2122 or fill out our online form for a same-day quote.
What areas do you serve?
We proudly serve St. Helens, Scappoose, Warren, Deer Island, Columbia City, Beaverton, Hillsboro, Portland Metro, and surrounding communities throughout Columbia County and Washington County. If you’re within 30 miles of St. Helens, we can typically accommodate your location.
Do you offer warranties or guarantees?
Yes! We offer a 100% satisfaction guarantee on all services. If you’re not completely happy with the results, we’ll come back and make it right at no additional charge. For moss treatments, we include a limited regrowth warranty, if treated moss returns within the warranty window, we’ll retreat the affected areas.
What payment methods do you accept?
We accept cash, all major credit cards, checks, and offer invoicing for commercial clients. Payment is due upon completion unless other arrangements are made. We also offer contactless payment options for your convenience.
Are you available for emergency cleaning?
Yes, we offer priority scheduling for emergency situations such as overflowing gutters causing active water damage, pre-inspection cleanings for home sales, or storm-related debris removal. Call us at (971) 328-2122 and let us know you have an urgent situation.
Do you offer maintenance plans?
Yes! We offer quarterly, biannual, and annual maintenance plans with discounted pricing and priority scheduling. Our most popular plan includes gutter cleaning in spring and fall plus annual roof treatment. Maintenance plan members save 15-20% and get priority booking during busy seasons.
How soon can you schedule me?
Most jobs can be scheduled within 3-7 days during peak season (spring and fall). During slower periods, we often have availability within 1-3 days. Emergency situations receive priority scheduling and can often be accommodated within 24-48 hours.
Do you offer discounts?
Yes! We offer discounts for first-time customers (10% off), multi-service packages (save 15-20% when booking multiple services together), senior citizens and veterans (ask about current offers), and maintenance plan members (15-20% savings). We also run seasonal promotions—check our website or ask when you call.
How often should I clean my gutters in Oregon?
Oregon homeowners should clean their gutters at least twice a year: once in late fall after the leaves drop and once in spring after pollen season. If your home is surrounded by Douglas fir, maple, or oak trees, you may need gutter cleaning 3–4 times per year. Regular cleaning prevents water damage, foundation issues, and fascia rot. For a step-by-step breakdown, read our guide on how to clean gutters like a pro.
Is soft washing safe for my roof?
Yes. Soft washing is the safest and most effective method for cleaning asphalt shingle, cedar, and tile roofs. Unlike pressure washing, which can strip protective granules from your shingles, soft washing uses low-pressure water combined with biodegradable cleaning solutions to kill moss and algae at the root without causing damage. It’s the method recommended by most roofing manufacturers. Learn more in our guide: How do you clean a shingle roof?
What causes moss to grow on roofs in Oregon?
Oregon’s combination of heavy rainfall, mild temperatures, shade from tall trees, and high humidity creates the perfect environment for moss growth. Moss thrives on north-facing roof slopes and in areas shaded by Douglas fir, maple, and alder trees. Once established, moss retains moisture against your shingles, which accelerates wear and can lead to leaks. Regular roof cleaning and moss treatment every 1–2 years is the best prevention. See also: How to remove moss from your driveway.
Do I need to be home during the cleaning?
No, you don’t need to be home. As long as we have access to the areas being cleaned and an outdoor water spigot, we can complete most services while you’re away. We’ll send you before-and-after photos and a summary when the job is done. If you prefer to be present for a walkthrough, we’re happy to schedule accordingly.